### Abstract

AC electrical properties of various conjugated polymers such as emeraldine base form of polyaniline, polyacetylene derivatives, and poly(1,4-phenylenevinylene) and its derivative are studied. Dielectric constant and conductivity are measured in the frequency range from 10 Hz to 2 MHz and in the temperature range from 78 to 300 K. Frequency dependence of ac dielectric constant follows Debye or Cole-Cole dielectric relaxation equation, and temperature dependence of relaxation time τ follows Arrhenius equation τ = τ_{0} exp(E_{a}/k_{B}T). Frequency dependence of ac conductivity shows a constant behavior in low-frequency regime (≤10 kHz) and a power-law behavior (σ approximately ω+s$/) in high-frequency regime (≥100 kHz). For the applications of multilayer films of conducting polymers such as electromagnetic interference (EMI) shielding or optical filter, we theoretically calculate the reflectance, absorbance, and EMI shielding efficiency in high-frequency range (≥1 GHz) based on plane wave theory.

Original language | English |
---|---|

Pages (from-to) | 109-113 |

Number of pages | 5 |

Journal | Synthetic Metals |

Volume | 117 |

Issue number | 1-3 |

DOIs | |

Publication status | Published - 2001 Feb 15 |

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### ASJC Scopus subject areas

- Electronic, Optical and Magnetic Materials
- Materials Chemistry
- Polymers and Plastics

### Cite this

*Synthetic Metals*,

*117*(1-3), 109-113. https://doi.org/10.1016/S0379-6779(00)00548-8

**AC electrical properties of conjugated polymers and theoretical high-frequency behavior of multilayer films.** / Lee, C. Y.; Kim, H. M.; Park, J. W.; Gal, Y. S.; Jin, J. I.; Joo, Jinsoo.

Research output: Contribution to journal › Article

*Synthetic Metals*, vol. 117, no. 1-3, pp. 109-113. https://doi.org/10.1016/S0379-6779(00)00548-8

}

TY - JOUR

T1 - AC electrical properties of conjugated polymers and theoretical high-frequency behavior of multilayer films

AU - Lee, C. Y.

AU - Kim, H. M.

AU - Park, J. W.

AU - Gal, Y. S.

AU - Jin, J. I.

AU - Joo, Jinsoo

PY - 2001/2/15

Y1 - 2001/2/15

N2 - AC electrical properties of various conjugated polymers such as emeraldine base form of polyaniline, polyacetylene derivatives, and poly(1,4-phenylenevinylene) and its derivative are studied. Dielectric constant and conductivity are measured in the frequency range from 10 Hz to 2 MHz and in the temperature range from 78 to 300 K. Frequency dependence of ac dielectric constant follows Debye or Cole-Cole dielectric relaxation equation, and temperature dependence of relaxation time τ follows Arrhenius equation τ = τ0 exp(Ea/kBT). Frequency dependence of ac conductivity shows a constant behavior in low-frequency regime (≤10 kHz) and a power-law behavior (σ approximately ω+s$/) in high-frequency regime (≥100 kHz). For the applications of multilayer films of conducting polymers such as electromagnetic interference (EMI) shielding or optical filter, we theoretically calculate the reflectance, absorbance, and EMI shielding efficiency in high-frequency range (≥1 GHz) based on plane wave theory.

AB - AC electrical properties of various conjugated polymers such as emeraldine base form of polyaniline, polyacetylene derivatives, and poly(1,4-phenylenevinylene) and its derivative are studied. Dielectric constant and conductivity are measured in the frequency range from 10 Hz to 2 MHz and in the temperature range from 78 to 300 K. Frequency dependence of ac dielectric constant follows Debye or Cole-Cole dielectric relaxation equation, and temperature dependence of relaxation time τ follows Arrhenius equation τ = τ0 exp(Ea/kBT). Frequency dependence of ac conductivity shows a constant behavior in low-frequency regime (≤10 kHz) and a power-law behavior (σ approximately ω+s$/) in high-frequency regime (≥100 kHz). For the applications of multilayer films of conducting polymers such as electromagnetic interference (EMI) shielding or optical filter, we theoretically calculate the reflectance, absorbance, and EMI shielding efficiency in high-frequency range (≥1 GHz) based on plane wave theory.

UR - http://www.scopus.com/inward/record.url?scp=0035247725&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=0035247725&partnerID=8YFLogxK

U2 - 10.1016/S0379-6779(00)00548-8

DO - 10.1016/S0379-6779(00)00548-8

M3 - Article

AN - SCOPUS:0035247725

VL - 117

SP - 109

EP - 113

JO - Synthetic Metals

JF - Synthetic Metals

SN - 0379-6779

IS - 1-3

ER -